Bio 132 Exam 1 Questions and Answers 100% Correct

Bio 132 Exam 1 Questions and Answers 100% Correct Most DNA is packed into - Answer- Chromosomes How many chromosomes do humans have - Answer- 46 (23 pairs) Somatic cells: - Answer- Any cells in the body other than reproductive cells Genes: - Answer- are the units of heredity and are made up of segments of DNA Genes are passed to the next generation via reproductive cells called: - Answer- gametes (sperm and eggs) locus - Answer- Location of a gene on a chromosome A life cycle: - Answer- the generation-to-generation sequence of stages in the reproductive history of an organism Fertilization: - Answer- the union of gametes (the sperm and the egg) Zygote - Answer- fertilized egg The zygote produces.... - Answer- somatic cells by mitosis and develops into an adult is a zygote diploid or haploid? - Answer- diploid meiosis results in... - Answer- one set of chromosomes in each gamete sporophyte: - Answer- A diploid organism that makes haploid spores by meiosis. T or F only diploid cells can undergo meiosis? - Answer- T sister chromatid cohesion - Answer- The name of the attachment of two sister chromatids. Protein complexes (cohesins) are responsible for this, they adhere two sister chromatids together. what are the 3 mechanisms that contribute to genetic variation - Answer- independent assortment of chromosomes crossing over random fertilization recombinant chromosomes - Answer- combine DNA inherited from each parent linked genes - Answer- Genes located on the same chromosome that tend to be inherited together in genetic crosses. genetic recombination - Answer- the production of offspring that have characters distinct from those of either the P generation parents recombinant types - Answer- Offspring with nonparental phenotypes (new combinations of traits) genetic map - Answer- an ordered list of genetic loci along a particular chromosome T or F the farther apart two genes are, the higher the probability that a crossover will occur between them and therefore the higher the recombination frequency - Answer- T